GERMINAÇÃO E MORFOLOGIA DE SEMENTES E PLÂNTULAS DE Albizia edwallii (Hoehne) Barneby &amp; J. W. Grimes

Duarte, Márcia do Rocio; Milani, Jaçanan Eloísa de Freitas; Blum, Christopher Thomas; Nogueira, Antônio Carlos

doi:10.1590/1983-21252015v28n319rc

Cited by 13 publications

(11 citation statements)

References 15 publications

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“…Light requirement for germination is interpreted as a way for the seed to recognize a canopy opening favorable to subsequent seedling growth (Dutra;Medeiros-Filho, & Diniz, 2008), as seeds with low reserve, a condition observed in group I, cannot maintain long-term seedling development under shade conditions. On the other hand, seeds of group II species, which exhibited considerably higher biomass in their seeds (Table 3), due to the presence of energy reserves, other abiotic factors, such as temperature alternation and soil moisture content, have a stronger influence to signal the germination process than the exposure to light (Matos & Landim, 2016).…”

Section: Discussionmentioning

confidence: 99%

Influence of the functional traits of seeds on germination dynamics and morphofunctional pattern of the seedlings

Polli¹,

Romagnolo²,

Souza³

et al. 2020

Acta Sci. Biol. Sci.

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Aiming to compare morphofunctional features related to dispersion and establishment of plants, this study evaluated seed biometry and biomass, as well as germination and emergence potential in eight plant species native to the Semideciduous Seasonal Forest. Biometric measurements and biomass of seeds were obtained with a caliper and a precision scale. Afterwards, they were subjected to a germination test in BOD chambers under constant temperature and 12 hours photoperiod, and sown in styrofoam trays containing organic substrate and sand, kept in full sunlight. Data from germination and emergence was subjected to cluster analysis, according to the functional morphotype of the seedling. Most species presented seeds with a rounded shape, uniform staining at the mature stage, varied coat consistency, two types of dispersal syndromes (anemochory and zoochory) and four morphofunctional patterns in developing seedlings (crypto-hypogeal-storers, crypto-epigeal-storers, phanero-epigeal-storers and phanero-epigeal-foliaceous). The species belonging to group I (Albizia niopoides, Cedrela fissilis, Pterogyne nitens and Randia ferox) have foliaceous photosynthetic cotyledons and group II (Cabralea canjerana, Eugenia pyriformis, Inga laurina and Poecilanthe parviflora) have a reserve cotyledon. Species of group I had higher means in the percentage and rate of germination, less variability and amplitude of days for seedlings emergence. On the other hand, species of group II showed higher mean values in seed biometry and biomass. Thus, seeds with foliaceous cotyledons have an optimized development because of luminosity, whereas seeds with reserve tend to have slower development, remaining at the seedling stage for a longer time.

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Section: Discussionmentioning

confidence: 99%

Influence of the functional traits of seeds on germination dynamics and morphofunctional pattern of the seedlings

Polli¹,

Romagnolo²,

Souza³

et al. 2020

Acta Sci. Biol. Sci.

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“…necessárias sobre a variação fenológica entre espécies de um mesmo gênero ou que se desenvolveram em condições ambientais diferenciadas (CRUZ et al, 2001;GUSMÃO et al, 2006;ALVES et al, 2007;CARVALHO, 2008;SANTOS et al, 2012;GONÇALVES et al, 2013;SILVA et al, 2014;DUARTE et al, 2015;MATOS et al, 2015;GOMES et al, 2016;PIRES NETO et al, 2016;SILVA et al, 2017;Santos et al, 2018;Santos et al, 2019), além de possibilitar maior aprimoramento na germinação e vigor das sementes NAKAGAWA, 2012;DUARTE et al, 2016).…”

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BIOMETRIA DE FRUTOS E SEMENTES E TRATAMENTOS PRÉ-GERMINATIVOS EM SEMENTES DE Hymenaea courbaril

Santos¹,

Silva²,

Costa³

et al. 2019

Rev. Agro. Amb.

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RESUMO: A caracterização de frutos e sementes de espécies florestais é fundamental para o conhecimento das condições ideais de germinação e seu uso na revegetação de ambientes degradados. Este trabalho teve por objetivo caracterizar biometricamente frutos e sementes e definir o método adequado para superação de dormência das sementes de Hymenaea courbaril. Foram mensurados comprimento, largura, espessura e massa de frutos e sementes, sendo posteriormente, as sementes submetidas aos seguintes tratamentos pré-germinativos: sementes sem tratamento (controle); ácido sulfúrico por 10; 20 e 30 minutos; escarificação mecânica; e imersão em água quente a 100 °C até resfriamento. Os dados biométricos foram submetidos à análise estatística descritiva e distribuição de frequência. Ao longo da germinação foram avaliadas a percentagem, índice de velocidade e tempo médio de germinação. Constatou-se que 15% da biomassa dos frutos foram alocadas para as sementes, 72% na casca e 13% na polpa farinácea. Os métodos pré-germinativos da escarificação química durante 30 minutos e mecânica apresentaram 80% e 93% da germinação, respectivamente. Os frutos e sementes de H. courbaril apresentaram ampla variação biométrica e de biomassa, o que constitui características importantes na germinação das sementes. Entre as classes, a biomassa variou entre 2,90 a 4,34 g. Os tratamentos que apresentaram germinação satisfatória foram ácido sulfúrico e lixa.ABSTRACT: Fruit and seed characterization of forest species is crucial for ideal germination conditions and its use in the re-vegetation of degraded environments. Current research characterizes biometrically fruits and seeds and defines the method to overcome dormancy of Hymenaea courbaril seed. Length, width, thickness, mass of fruit and seeds were measured. Seeds underwent the following pre-germination treatments: seeds without any treatment (control); sulfuric acid for 10, 20 and 30 minutes; mechanical scarification; immersion in hot water at 100 °C until cooling. Biometric data underwent descriptive statistical analysis and frequency distribution. Percentage, speed index and mean germination period were assessed throughout germination. Results show that 15% of fruit biomass were allocated to seeds, namely, 72% in the rind and 13% in the pulp. Pre-germination method of chemical and mechanical scarification during 30 minutes provided 80 and 93% of germination, respectively. Fruits and seeds of H. courbaril provided a wide biometric and biomass variation, forming important characteristics in seed germination. Biomass varied between 2.90 and 4.34 g. Treatment with satisfactory germination were sulfuric acid and sandpaper.KEY WORDS: Allocation of biomass; Dormancy; Forest seeds. INTRODUÇÃOA espécie arbórea Hymenaea courbaril Linnaeus, conhecida como jatobá, jutaí ou jataí, pertencente à família Fabaceae e ultimamente tem despertado o interesse de estudiosos e pesquisadores por possuir características de interesse econômico para medicina popular, alimentação, construção civil, entre outras. A espéci...

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“…The media composed of agar, MS, SH, B5 and White provided the same timing of germination of spores ( Figure 2C). The synchronization indices are interpreted in a simple way, the lower the value the more synchronized the germination is in relation to time and the greater the value is the less synchronized the germination is (Duarte et al, 2015).…”

Section: Resultsmentioning

confidence: 99%

Germination of spores of Amazonian ferns Polypodium aureum in different culture media

Alves

Takata

2019

Ornam. Hortic.

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The greatest diversity of ferns occurs in the tropics, where approximately three in four of the species are found. In the Brazilian flora, the ferns have megadiversity, being an important plant group. The objective was to evaluate the spores germination of ferns Polypodium aureum in different types of culture medium. The sporangia were removed from fertile fronds and sterilized with sodium hypochlorite 0.57% during 30 minutes. After sterilization, the sporangia were seeded in culture media agar, MS, SH, White and B5. The experimental design was completely randomized being composed of 5 treatments (agar media, B5, SH, White and MS) and 10 replications. The ratings occurred every 3 days over a period of 45 days, counting the number of spores germinated. After this period, the germination percentage, germination time on medium, germination speed index and timing of germination were calculated. The germination percentage and the index of synchronization have not changed in function of different culture media. The medium White presented the highest average for the germination speed index whereas the agar media, MS, SH and B5 had the same germination speeds. The percentage of mortality was higher in MS medium, the White medium presented the lowest percentage of mortality, and the media composed by agar, SH and B5 showed intermediate values. The lowest average germination time occurred at the media SH and B5, since the environment composed by agar showed higher average germination time. The media MS and White showed similar results to the agar, SH and B5. Based on the obtained results, it can be concluded that the White medium is the most effective on the germination of spores of Polypodium aureum.

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GERMINAÇÃO E MORFOLOGIA DE SEMENTES E PLÂNTULAS DE Albizia edwallii (Hoehne) Barneby & J. W. Grimes

Cited by 13 publications

References 15 publications

Influence of the functional traits of seeds on germination dynamics and morphofunctional pattern of the seedlings

Influence of the functional traits of seeds on germination dynamics and morphofunctional pattern of the seedlings

BIOMETRIA DE FRUTOS E SEMENTES E TRATAMENTOS PRÉ-GERMINATIVOS EM SEMENTES DE Hymenaea courbaril

Germination of spores of Amazonian ferns Polypodium aureum in different culture media

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